CN219062700U - Joint - Google Patents
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- CN219062700U CN219062700U CN202222536520.7U CN202222536520U CN219062700U CN 219062700 U CN219062700 U CN 219062700U CN 202222536520 U CN202222536520 U CN 202222536520U CN 219062700 U CN219062700 U CN 219062700U
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- stainless steel
- steel pipe
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- aluminum
- pipe
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Abstract
The utility model discloses a joint, which comprises a stainless steel pipe and an aluminum pipe, wherein the outer wall of a first end of the stainless steel pipe is subjected to knurling treatment, the height of a bulge formed after knurling is 0.2-0.7 mm, the aluminum pipe is sleeved outside the first end of the stainless steel pipe, the top end of the bulge of the outer wall of the stainless steel pipe is embedded into the inner wall of the aluminum pipe, so that a plurality of air hole channels are formed among the stainless steel pipe, the bulge and the inner wall of the aluminum pipe, the stainless steel pipe and the aluminum pipe are welded by aluminum solder, and the molten solder flows into the air hole channels to enable the stainless steel pipe and the aluminum pipe to be in sealing and fastening connection.
Description
Technical Field
The utility model belongs to the technical field of hardware spare and accessory parts, and particularly relates to a joint.
Background
Some existing joints are formed by connecting copper pipes and stainless steel pipes, two pipes are formed by adopting an inner wall and outer wall overlapping smooth lap joint mode, and are welded by adopting copper-based solder, the welding temperature needs to be higher than thousand DEG C, and the production and manufacturing cost is high. The joint is welded after the stainless steel pipe and the aluminum pipe are in smooth lap joint or threaded connection, and the joint has low welding strength and unstable welding quality.
Disclosure of Invention
The utility model aims to solve the problems in the background technology and provides a joint.
In order to achieve the above purpose, the utility model provides a joint, which comprises a stainless steel pipe and an aluminum pipe, wherein the outer wall of the first end of the stainless steel pipe is subjected to knurling treatment, the height of a protrusion formed after knurling is 0.2-0.7 mm, the aluminum pipe is sleeved outside the first end of the stainless steel pipe, the top end of the protrusion of the outer wall of the stainless steel pipe is embedded into the inner wall of the aluminum pipe in a pressing manner so that a plurality of air hole channels are formed among the stainless steel pipe, the protrusion and the inner wall of the aluminum pipe, the stainless steel pipe and the aluminum pipe are welded by aluminum solder, and the melted solder flows into the air hole channels so that the stainless steel pipe and the aluminum pipe are in sealing and fastening connection.
Preferably, the depth of the protruding tip of the outer wall of the stainless steel tube which is embedded and pressed into the inner wall of the aluminum tube is not less than 0.05mm.
Preferably, an annular groove is formed in the outer wall of the first end of the stainless steel tube, and the annular groove is connected with one end of the protrusion.
Preferably, the cross section of the protrusion is in a sharp corner shape.
Preferably, the second end of the stainless steel tube is internally threaded.
The utility model has the beneficial effects that: according to the utility model, the outer wall of the stainless steel pipe is subjected to knurling treatment, the end parts of the bulges formed by knurling are embedded into the inner wall of the aluminum pipe, so that a plurality of air hole channels are formed among the stainless steel pipe, the bulges and the inner wall of the aluminum pipe, the stainless steel pipe and the aluminum pipe are welded by aluminum solder, and the molten solder flows into the air hole channels to enable the stainless steel pipe and the aluminum pipe to be in sealing and fastening connection, so that the welding strength and stability between the stainless steel pipe and the aluminum pipe are improved, and the welding temperature required by using the aluminum solder is low.
The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present utility model.
Fig. 2 is a top view of an embodiment of the present utility model.
Fig. 3 is a front cross-sectional view of an embodiment of the present utility model.
Fig. 4 is a schematic view of an aluminum pipe according to an embodiment of the utility model.
Fig. 5 is a schematic view of a stainless steel tube according to an embodiment of the present utility model.
In the figure: 1-stainless steel tube, 2-aluminum tube, 11-protrusion and 12-annular groove.
Detailed Description
Referring to fig. 1 to 5, the present embodiment provides a joint, including a stainless steel tube 1 and an aluminum tube 2, wherein the outer wall of the first end of the stainless steel tube 1 is knurled, the height of a boss 11 formed after knurling is 0.2-0.7 mm, the aluminum tube 2 is sleeved outside the first end of the stainless steel tube 1, the top end of the boss 11 on the outer wall of the stainless steel tube 1 is embedded into the inner wall of the aluminum tube 2, so that a plurality of air hole channels are formed between the stainless steel tube 1, the boss 11 and the inner wall of the aluminum tube 2, the stainless steel tube 1 and the aluminum tube 2 are welded by aluminum solder, and the melted solder flows into the air hole channels to enable the stainless steel tube 1 and the aluminum tube 2 to be tightly and tightly connected, the arrangement of the air hole channels is favorable for inflow of molten solder, the required welding temperature is 600-700 ℃ when the aluminum tube 2 is welded by the aluminum solder, the joint is not exploded under the condition of 50Mpa, and the stainless steel tube 1 and the aluminum tube 2 are welded by a vacuum furnace/tunnel furnace.
Further, the depth of the top end of the protrusion 11 embedded in the outer wall of the stainless steel tube 1 and pressed into the inner wall of the aluminum tube 2 is not less than 0.05mm, so that sufficient contact area between the two is ensured, and certain connection strength is achieved.
Further, an annular groove 12 is formed in the outer wall of the first end of the stainless steel tube 1, the annular groove 12 is connected with one end of the protrusion 11, and the annular groove 12 is arranged to facilitate molten solder to be distributed and flow into each air hole channel.
Further, the cross section of the protrusion 11 is in a sharp angle shape, so that the end part of the protrusion 11 is conveniently embedded into the inner wall of the aluminum pipe 2.
Further, the second end of the stainless steel pipe 1 is internally provided with threads, so that the joint and the pipeline can be conveniently disassembled and assembled.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
Claims (5)
1. A joint, characterized in that: the stainless steel pipe is characterized by comprising a stainless steel pipe and an aluminum pipe, wherein the outer wall of the first end of the stainless steel pipe is subjected to knurling treatment, the height of a bulge formed after knurling is 0.2-0.7 mm, the aluminum pipe is sleeved outside the first end of the stainless steel pipe, the bulge top of the outer wall of the stainless steel pipe is embedded into the inner wall of the aluminum pipe, a plurality of air hole channels are formed among the stainless steel pipe, the bulge and the inner wall of the aluminum pipe, the stainless steel pipe and the aluminum pipe are welded by aluminum solder, and the molten solder flows into the air hole channels to enable the stainless steel pipe and the aluminum pipe to be in sealing and fastening connection.
2. The joint of claim 1, wherein: the depth of the protruding top end embedded into the inner wall of the aluminum pipe of the stainless steel pipe outer wall is not less than 0.05mm.
3. The joint of claim 1, wherein: the outer wall of the first end of the stainless steel pipe is provided with an annular groove, and the annular groove is connected with one end of the protrusion.
4. The joint of claim 1, wherein: the cross section of the bulge is in a sharp angle shape.
5. The joint of claim 1, wherein: and threads are arranged inside the second end of the stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222536520.7U CN219062700U (en) | 2022-09-21 | 2022-09-21 | Joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222536520.7U CN219062700U (en) | 2022-09-21 | 2022-09-21 | Joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219062700U true CN219062700U (en) | 2023-05-23 |
Family
ID=86342063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222536520.7U Active CN219062700U (en) | 2022-09-21 | 2022-09-21 | Joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219062700U (en) |
-
2022
- 2022-09-21 CN CN202222536520.7U patent/CN219062700U/en active Active
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant |